Quarter	US dollars
1999-09-30	3117
1999-12-31	2876
2000-03-31	3084
2000-06-30	3313
2000-09-30	3826
2000-12-31	3594
2001-03-31	4224
2001-06-30	3947
2001-09-30	5043
2001-12-31	4314
2002-03-31	3277
2002-06-30	6210
2002-09-30	6177
2002-12-31	7362
2003-03-31	7160
2003-06-30	8548
2003-09-30	9070
2003-12-31	11040
2004-03-31	10107
2004-06-30	8222
2004-09-30	9213
2004-12-31	12136
2005-03-31	10068
2005-06-30	13835
2005-09-30	11704
2005-12-31	10104
2006-03-31	8457
2006-06-30	9693
2006-09-30	8624
2006-12-31	10511
2007-03-31	10791
2007-06-30	13124
2007-09-30	16870
2007-12-31	18931
2008-03-31	30478
2008-06-30	31046
2008-09-30	33154
2008-12-31	70848
2009-03-31	53566
2009-06-30	60306
2009-09-30	65048
2009-12-31	59320
2010-03-31	60362
2010-06-30	66150
2010-09-30	108683
2010-12-31	84485
2011-03-31	46820
2011-06-30	50766
2011-09-30	67920
2011-12-31	62428
2012-03-31	63165
2012-06-30	64113
2012-09-30	50254
2012-12-31	52614
2013-03-31	50436
2013-06-30	40185
2013-09-30	38362
2013-12-31	37219
2014-03-31	35832
2014-06-30	45126
2014-09-30	50580
2014-12-31	55379
2015-03-31	58359
2015-06-30	41584
2015-09-30	41483
2015-12-31	34244
2016-03-31	40999
2016-06-30	42949
2016-09-30	41218
2016-12-31	31464
2017-03-31	25612
2017-06-30	24026
2017-09-30	22009
2017-12-31	21104
2018-03-31	21296
2018-06-30	13066
2018-09-30	13792
2018-12-31	19217
2019-03-31	21497
2019-06-30	22801
2019-09-30	32336
2019-12-31	25361
2020-03-31	27117
2020-06-30	27992
2020-09-30	27785
2020-12-31	25586
2021-03-31	23853
2021-06-30	21060
2021-09-30	19861
2021-12-31	19073
2022-03-31	23344
2022-06-30	33305
2022-09-30	37977
2022-12-31	36994
2023-03-31	36945
2023-06-30	37273
2023-09-30	44626